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March 16 1926;. 1,576,508

E. R. HlsEY ET AL STOVEPIPE FASTENER Filed Jan. 5, 1924 [N VENTORS 5.1?.Hl S C .C. Par n ATTORNEY.

Patented Mar. 16, `1926. i,

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Application filed January 3, 1924. Serial No. G84-,202. Y f

To all 'whom 'it may concern Be it known that we, EDWINA R. Hisnr andOiiivnn C. PATTON, citiaciisgof the United States, residing at Guernsey,in the county of Platte and State of l/Vyoming, aiidDenver, inthe countyof Denver and State of Colorado, respectively, have invented certain newand useful improvements in Stovepipe Fasteners, of which th followingvisa specification.

This invention relates to an appliance for Y securing pipesrvincorrespondingly formed .passages and its object is to provide a simpleand readily adJusted device for fastening a r pipe in` an opening inwhich it is` inserted,

hy inwardly applied and outwardly directed pressure.y

Our invention is particularly adaptedl for use in connection with smokepipes of;

stoves and furnaces, at vthe point at which they enter the chimney flue,it being well known that the accidental displacement of the pipes atthat point is a frequentv occurrence which often results in seriousdamage r to the building` in which the pipes are installed, by theescape of smoke and fire.

The appliance consists of an expander of simple construction which isplaced inside the stove pipe before it is inserted in the flue and whichremains a permanent part thereof. rllie construction of the expanderpermits of its ready operation by a hand inserted in the pipe from theinner end thereof, and its action upon the inner surface of the pipe atdifferent points of'its "circumference, causes the pipe to frictionallyengage with the surface of the passage in which it i's inserted with theeffect that the pipe is securely locked against displacement. Y

It is an aim of our invention to construe the expander so that it may beproduced at a very low cost, thereby permitting of its application tosmoke pipes and other similar fines and conduits without materialincrease in the selling price thereof, and it will be apparent thatalthough the application of our invention may increase the initialpurchase price of the pipes, the increase is fully compensated by thereduced cost of installation 'since the usel of the expander completelyeliminates the provision of braces, wiiing, cementing and otherexpedients now commonly used te hold the pipes in constantiand air-tight`connectionwith theilu'es in which they are, inserted.

An embodiment of ourfinvention has been y illustrated in the.accompanying drawings in which similar characters of reference designateYcorresponding parts throughout the several views and in which- A .y

Figure l represents a sectional elevation of a flue, anda' therewithconnecting pipe to which ourY invention is applied;

y Figure 2, a'nviuchenlarged section taken on the line 2 2, Figure l;`Figure 3, a fragmentaary section along the line, 3 3, Figuref2; and fFigure ha similar'section taken onthe line l-Jl,Figure 2.l Y Y'Referringto the drawings, the reference character 5 y designates anupright. flue structure made of brick "or other suitable buildingmaterial and havinga lateral inlet opening 6 for its connection with thesheet metal pipe 7 of the furnace, stove or other heating apparatus.

e.` ra'rron, for iiniiviin,`

The inlet opening of the flue is usually lined with a sheet metalthimble 8 and the end of the pipe which fits inside the thiinble, hasabeadv 7a to limit its inward movement.

The expander which secures the pipe inside the opening in accordancewith oni' invention, comprises two complementary sections 9 which areconnected by a rotary bolt The sections each yhave two diverging legs 9aconnected by an intermediate part 9C to which the boltis applied and theends of the legs are concaved to provide pointed teeth 9d for engagementwith theV surface of a conduitto which the expanderis applied.

The connections between the legs have central screw-threaded openingsand the two screw-threads of the' sections of each expander areoppositely directed to provide for the application of a bolt having arightliand screw thread and a lefthand 'screw thread respectivelyatopposite ends thereof.

A hand-lever 12 passes through a central opening of the screw tofacilitate its rotation, both ends of the lever having been enlarged asat 13 to prevent its disconnection from the bolt.

In Vthe operation of our invention, the pipe section 7 equipped with theexpander,

is inserted in the inlet opening of the flue rsi until the bead on thesection engages the outer surface of the same. The operator then insertsa hand into the pipe section through the inner end thereof and bymanipulation of the lever 12, turns the bolt 10 and thereby causes thesections of the expander to further separate until the pipe is clampedtightly in the opening ofthe liue.

It will be apparent that the pipe thus secured is easily removed forcleaning or repairs by a few turns of thebolt in the opposite direction.

Having thus described our fastening appliance, we desire it understoodthat changes in details of construction of its cooperating parts may bemade within the spirit of our invention as defined in the followingclaims.

What we claim and desire to secure by Letters Patent is:

l. A flue fastener comprising two rigid members having a plurality ofseparated prongs adapted to indent. the inner surface of a flue. incircular alinement, and manual means to enlarge the circle of the prongsby separative adjustment of the members.

2. A flue fastener comprising two members reversely positioned withrelation to each other in a common plane and each composed of tworigidly connected, divergent and rigid legs the ends of which arepointed to indent the inner surface of the flue, and

manual means associated with the connections of the members for theirsimultaneous separative adjustment.

i 3. A flue fastener comprising two members reversely positioned withrelation to each other in a common plane and each composed of twodiverging rigid legs and an integral connection between adjacent endsthereof, provided with a central threaded aperture, and a bolt havingright and left hand screw threads cooperatively engaging in saidapertures, the free ends of the legs being pointed to indent the surfaceof the flue when the members are forced apart by rotation of the bolt.

4f. The combination with a flue, of 'a fastener comprising two memberseach having two rigidly connected, rigid and diverging legs the freeextremities of which have points adapted to indent the metal of theiiue, the members being .disposed in a common plane with the points oftheir legs engaging the inner surface of the flue in circular alinement,and manual means associated with the connections of the members toenlarge the circle of their prongs by simultaneous outward adjustment ofthe members.

In testimony whereof we have affixed our signatures.

EDVIN R. HISEY. OLIVER C. PATTON.

